The San Mateo Testbed is an 8.5 mile long stretch of the US 101 freeway and State Route 82 (El Camino Real) in San Mateo County located approximately 10 miles south of the San Francisco International Airport. The US 101 freeway is an 8 lane freeway, transitioning to 6 mixed flow lanes plus 2 peak period HOV 2+ lanes. El Camino Real (State Route 82) is a 4 to 6 lane signalized divided arterial with a posted 35 mph speed limit. The US 101 freeway carries between 200,000 and 250,000 Average Annual Daily Traffic (AADT) of which 15-25% are HOV 2+ vehicles. El Camino Real carries between 25,000 and 50,000 AADT.